The MergeInitializer is a super-simple mixin that allows you to initialize a subclass of Hash with another Hash to give you faster startup time for Hash subclasses. Note that you can still provide a default value as a second argument to the initializer.
@example
class MyHash < Hash include Hashie::Extensions::MergeInitializer end h = MyHash.new(:abc => 'def') h[:abc] # => 'def'
# File lib/hashie/extensions/merge_initializer.rb, line 18 def initialize(hash = {}, default = nil, &block) default ? super(default) : super(&block) hash.each do |key, value| self[key] = value end end